'use strict';

var util = require('./util');
var event = require('./event');
var task = require('./task');
var base = require('./base');
var advance = require('./advance');
var pkg = require('../package.json');

var defaultOptions = {
  AppId: '', // AppId 已废弃，请拼接到 Bucket 后传入，例如：test-1250000000
  SecretId: '',
  SecretKey: '',
  SecurityToken: '', // 使用临时密钥需要注意自行刷新 Token
  ChunkRetryTimes: 2,
  FileParallelLimit: 3,
  ChunkParallelLimit: 3,
  ChunkSize: 1024 * 1024,
  SliceSize: 1024 * 1024,
  CopyChunkParallelLimit: 20,
  CopyChunkSize: 1024 * 1024 * 10,
  CopySliceSize: 1024 * 1024 * 10,
  MaxPartNumber: 10000,
  ProgressInterval: 1000,
  Domain: '',
  ServiceDomain: '',
  Protocol: '',
  CompatibilityMode: false,
  ForcePathStyle: false,
  UseRawKey: false,
  Timeout: 0, // 单位毫秒，0 代表不设置超时时间
  CorrectClockSkew: true,
  SystemClockOffset: 0, // 单位毫秒，ms
  UploadCheckContentMd5: false,
  UploadQueueSize: 1000,
  UploadIdCacheLimit: 500,
  Proxy: '',
  Tunnel: undefined,
  Ip: '',
  StrictSsl: true,
  KeepAlive: true,
  FollowRedirect: false,
  UseAccelerate: false,
  UserAgent: '',
  ConfCwd: '',
  ForceSignHost: true, // 默认将host加入签名计算，关闭后可能导致越权风险，建议保持为true
  // 动态秘钥，优先级Credentials > SecretId/SecretKey。注意Cred内是小写的secretId、secretKey
  Credentials: {
    secretId: '',
    secretKey: '',
  },
};

const watch = (obj, name, callback) => {
  let value = obj[name];
  Object.defineProperty(obj, name, {
    get() {
      return value;
    },
    set(newValue) {
      value = newValue;
      callback();
    },
  });
};

// 对外暴露的类
var COS = function (options) {
  this.options = util.extend(util.clone(defaultOptions), options || {});
  this.options.FileParallelLimit = Math.max(1, this.options.FileParallelLimit);
  this.options.ChunkParallelLimit = Math.max(1, this.options.ChunkParallelLimit);
  this.options.ChunkRetryTimes = Math.max(0, this.options.ChunkRetryTimes);
  this.options.ChunkSize = Math.max(1024 * 1024, this.options.ChunkSize);
  this.options.CopyChunkParallelLimit = Math.max(1, this.options.CopyChunkParallelLimit);
  this.options.CopyChunkSize = Math.max(1024 * 1024, this.options.CopyChunkSize);
  this.options.CopySliceSize = Math.max(0, this.options.CopySliceSize);
  this.options.MaxPartNumber = Math.max(1024, Math.min(10000, this.options.MaxPartNumber));
  this.options.Timeout = Math.max(0, this.options.Timeout);
  if (this.options.AppId) {
    console.warn(
      'warning: AppId has been deprecated, Please put it at the end of parameter Bucket(E.g: "test-1250000000").',
    );
  }
  // 云API SDK 用小写密钥，这里兼容并 warning
  if (this.options.secretId || this.options.secretKey) {
    if (this.options.secretId && !this.options.SecretId) this.options.SecretId = this.options.secretId;
    if (this.options.secretKey && !this.options.SecretKey) this.options.SecretKey = this.options.secretKey;
    console.warn('warning: Please change options secretId/secretKey to SecretId/SecretKey.');
  }
  // 支持外部传入Cred动态秘钥
  if (this.options.Credentials.secretId && this.options.Credentials.secretKey) {
    this.options.SecretId = this.options.Credentials.secretId || '';
    this.options.SecretKey = this.options.Credentials.secretKey || '';
  }
  if (this.options.SecretId && this.options.SecretId.indexOf(' ') > -1) {
    console.error('error: SecretId格式错误，请检查');
    console.error('error: SecretId format is incorrect. Please check');
  }
  if (this.options.SecretKey && this.options.SecretKey.indexOf(' ') > -1) {
    console.error('error: SecretKey格式错误，请检查');
    console.error('error: SecretKey format is incorrect. Please check');
  }
  if (util.isWeb()) {
    console.warn(
      'warning: cos-nodejs-sdk-v5 不支持浏览器使用，请改用 cos-js-sdk-v5，参考文档： https://cloud.tencent.com/document/product/436/11459',
    );
    console.warn(
      'warning: cos-nodejs-sdk-v5 does not support browsers. Please use cos-js-sdk-v5 instead, See: https://cloud.tencent.com/document/product/436/11459',
    );
  }
  event.init(this);
  task.init(this);

  // 支持动态秘钥，监听到cred里secretId、secretKey变化时，主动给cos替换秘钥
  watch(this.options.Credentials, 'secretId', () => {
    console.log('Credentials secretId changed');
    this.options.SecretId = this.options.Credentials.secretId;
  });
  watch(this.options.Credentials, 'secretKey', () => {
    console.log('Credentials secretKey changed');
    this.options.SecretKey = this.options.Credentials.secretKey;
  });
};

base.init(COS, task);
advance.init(COS, task);

COS.util = {
  md5: util.md5,
  xml2json: util.xml2json,
  json2xml: util.json2xml,
  encodeBase64: util.encodeBase64,
};
COS.getAuthorization = util.getAuth;
COS.version = pkg.version;

module.exports = COS;